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shimano GRX RX810 11 Speed RX810 RX812 Groupset Road Bike Groupset 170/172.5 30/32/34/40/42T Bicycle Group Set 1*11 speed|Bicycle Derailleur| - AliExpress
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Amazon.com: Shimano GRX RD-RX810 Rear Derailleur - 11-Speed, Long Cage, Black, With Clutch, For 1x and 2x : Everything Else
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Shimano GRX Limited Groupset (Silver) (2 x 11 Speed) (Drop Bar) (Hydraulic Disc) (172.5mm) - Performance Bicycle
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